CN104640192A - Transmitting power control method, Mesh node and wireless network-shaped network system - Google Patents
Transmitting power control method, Mesh node and wireless network-shaped network system Download PDFInfo
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- CN104640192A CN104640192A CN201510031496.3A CN201510031496A CN104640192A CN 104640192 A CN104640192 A CN 104640192A CN 201510031496 A CN201510031496 A CN 201510031496A CN 104640192 A CN104640192 A CN 104640192A
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- message
- transmitting power
- node
- neighbor node
- mesh
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
Abstract
The invention discloses a transmitting power control method. The method comprises the following steps: a Mesh node acquires actual number of surrounding neighbor nodes; the Mesh node calculates new transmitting power of the Mesh node according to the actual quantity; the Mesh node transmits a wireless signal according to the new transmitting power. The transmitting power of the Mesh node is adaptively adjusted based on the number of the neighbor nodes, so the transmitting power can be adaptively adjusted by the Mesh in different environments, the transmitting power of the Mesh node is scientifically and flexibly adjusted, the efficiency of an entire Mesh network is improved, and the stability of the network is guaranteed. Meanwhile, the embodiment of the invention also provides the Mesh node and a wireless network-shaped network system comprising a plurality of Mesh nodes. Equipment in the network can have an ideal number of neighbors, so that network connection is effectively realized, and higher stability of the network on different scales is guaranteed.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of transmit power controlling method, Mesh node and wireless mesh network system.
Background technology
Wireless Mesh netword (Wireless Mesh Networks, WMN) is the multi-hop wireless network of a kind of self-organizing, self-configuring, and its network configuration as shown in Figure 1.There are 4 kind equipments: Mesh gateway device (Mesh Portal Point in WMN, MPP), Mesh forwarding unit (Mesh Point, MP), Mesh access device (Mesh Access Point, and wireless terminal (Station, STA) MAP).In WMN, Mesh equipment (comprising MPP, MP and MAP) is formed wireless backbone in radio interconnected mode, and wherein MPP is connected to Internet in a wired fashion as gateway (Gateway).MP is other Mesh device forwards message as router, MAP as AP for the mobile terminal in its coverage provides wireless connections, mobile terminal (Phone, PDA etc.) with cover the MAP in its region and connect, and lead to gateway in the mode of wireless multi-hop and realize Internet access.
Compared with traditional WLAN, WMN has many advantages: (1), owing to only needing little cable network tie point (gateway), the wiring cost of network reduces greatly; (2) multi-hop wireless communication provides wider wireless coverage; (3) how point-to-multipoint in wireless backbone connection, enhances the reliability of network; (4) between Mesh equipment, foundation is connected with maintenance automatically, and be easy to the incremental deploying of network, network has good extensibility.
Wireless device (comprising MPP, MP and MAP) in wireless mesh network has a transmitting power when working, and this transmission power level pre-sets.For wireless device, in the whole course of work, transmitting power size is rule of thumb set by engineer usually.
In general, source device transmitting power is larger, and the signal energy that object equipment receives is larger, and signal to noise ratio is larger, and the error rate is just lower.But this is not should unconfined raising transmitting power, because improve transmitting power to be subject to a lot of restriction: first is improve transmitting power just to mean and will improve energy consumption; Second is when power exceeds to a certain degree time, does not just have positive effect to the improvement of the error rate, there is no need to increase transmitting power again; 3rd is increase transmitting power to be increased interference for other incoherent equipment, reduces network capacity.
So transmitting power is not more high better, but neither be more low better, because too low being just difficult to of transmitting power receives useful signal.Therefore, the transmitting power that suitable is needed to find.User can not be concerned about that this transmitting power is that much ability is suitable actually, and is difficult to control in real time, needs to introduce some automatic adjustment mechanisms and equipment automatically can be adjusted transmitting power.
It is one of mesh network network key technology that power controls.Its objective is the connectedness ensureing wireless mesh network, net control disturbs, and improves frequency repeat utilization ratio.Suitable transmitting power can reduce to disturb between radio channel signals, improves spectrum reuse efficiency.
In prior art, power is controlled to there is following shortcoming:
1, the power setting of Mesh equipment lacks foundation.The reason caused is: the power setting of Mesh equipment, usually by manually rule of thumb arranging, lacks scientific basis.
2, during plant capacity dynamic conditioning, network overhead is added.The reason caused is: in network operation process, receiving equipment is according to the signal quality situation of the transmitting apparatus received, notice transmitting apparatus adjusts its power, because wireless network environment is complicated, if initial power arranges improper, then need repeatedly to adjust and could obtain suitable power, add network overhead, affect network efficiency.
3, the adjustment of Mesh plant capacity is unreasonable, can cause Mesh network hydraulic performance decline.
Mesh network is a kind of how point-to-multipoint network, and the deployment of Mesh equipment is comparatively intensive, and the power adjustment of a Mesh equipment, can have an impact to the neighbor device of surrounding: increasing power usually, may produce interference to neighbor device; Reduce power, may efficiency of transmission be affected again.
Summary of the invention
The present invention is directed to the Power Control Problem of wireless Mesh netword, propose a kind of adaptive wireless Mesh network power control scheme, can science, adjust the transmitting power of Mesh equipment flexibly, improve the efficiency of whole Mesh network.
To achieve the above object, the embodiment of the present invention provides a kind of transmit power controlling method, comprising:
Mesh node obtains the actual quantity of neighbor node around;
Described Mesh node calculates the new transmitting power of described Mesh node according to described actual quantity;
Described Mesh node is according to described new transmitting power wireless signal emission.
Further, described Mesh node obtains the actual quantity of neighbor node around, specifically comprises:
Mesh node is with the first transmitting power peripherad neighbor node broadcast detect-message;
Described Mesh node receives the feedback message corresponding to described detect-message that neighbor node around returns;
The quantity of the feedback message received by described Mesh node statistics, using the actual quantity as described neighbor node.
Further, described Mesh node obtains the actual quantity of neighbor node around, specifically comprises:
Mesh node is with the first transmitting power peripherad neighbor node broadcast detect-message; Wherein, described detect-message comprises the ID of message SN and described Mesh node;
Described Mesh node receives the feedback message that neighbor node around returns; Wherein, described feedback message comprises the ID of the neighbor node of message SN and this feedback message of transmission;
Described Mesh node, from received feedback message, selects the feedback message with described detect-message with identical message sequence number;
According to the ID of the neighbor node in selected feedback message, count the actual quantity of neighbor node.
Further, the described new transmitting power calculating described Mesh node according to described actual quantity, specifically according to following formulae discovery:
W
2＝W
1*{1+[(N
1-N
2)*10]％}
Wherein, W
2for the new transmitting power of described Mesh node, W
1for described first transmitting power, N
1for the desired amt of pre-configured neighbor node, N
2for the actual quantity of neighbor node.
In order to reach above-mentioned identical object, the embodiment of the present invention additionally provides a kind of Mesh node, comprising:
Quantity acquisition module, for obtaining the actual quantity of the neighbor node of surrounding;
Transmitting power computing module, for calculating the new transmitting power of described Mesh node according to described actual quantity;
Wireless signal transmitting module, for according to described new transmitting power wireless signal emission.
Further, described quantity acquisition module comprises:
Detect-message radio unit, for broadcasting detect-message with the peripherad neighbor node of the first transmitting power;
Feedback message receiving element, the feedback message corresponding to described detect-message that the neighbor node for receiving surrounding returns;
Quantity statistics unit, for adding up the quantity of received feedback message, using the actual quantity as described neighbor node.
Further, described quantity acquisition module comprises:
Detect-message radio unit, for broadcasting detect-message with the peripherad neighbor node of the first transmitting power; Wherein, described detect-message comprises the ID of message SN and described Mesh node;
Feedback message receiving element, the feedback message that the neighbor node for receiving surrounding returns; Wherein, described feedback message comprises the ID of the neighbor node of message SN and this feedback message of transmission;
Feedback message selected cell, for from received feedback message, selects the feedback message with described detect-message with identical message sequence number;
Quantity statistics unit, for the ID according to the neighbor node in selected feedback message, counts the actual quantity of neighbor node.
Further, the described transmitting power computing module specifically transmitting power of Mesh node according to following formulae discovery:
W
2＝W
1*{1+[(N
1-N
2)*10]％}
Wherein, W
2for the new transmitting power of described Mesh node, W
1for described first transmitting power, N
1for the desired amt of pre-configured neighbor node, N
2for the actual quantity of neighbor node.
In addition, the embodiment of the present invention also provides a kind of wireless mesh network system, comprises multiple above-mentioned Mesh node.
Implement the embodiment of the present invention, there is following beneficial effect:
The embodiment of the present invention proposes a kind of transmit power controlling method, based on the transmitting power of the self-adaptative adjustment Mesh node of neighbor node quantity, specifically according to described actual quantity calculate described Mesh node new transmitting power and according to described new transmitting power wireless signal emission, can make to be in the adaptive adjustment transmitting power of Mesh under varying environment, the power of science, flexibly adjustment Mesh node, improve the efficiency of whole Mesh network, ensure the stability of network.Simultaneously, the embodiment of the present invention also proposes a kind of Mesh node and comprises the wireless mesh network system of multiple described Mesh node, can make neighbours' quantity that the equipment in network all reaches desirable, thus effectively complete network connection, Logistics networks all has higher stability under different scales.
Accompanying drawing explanation
Fig. 1 is the structural representation of wireless Mesh netword;
Fig. 2 is the schematic flow sheet of the transmit power controlling method that the embodiment of the present invention provides;
Fig. 3 is the schematic flow sheet of step S1 in the embodiment of the present invention;
Fig. 4 is the schematic flow sheet of step S1 in another embodiment of the present invention;
Fig. 5 is the structured flowchart of the Mesh node that the embodiment of the present invention provides;
Fig. 6 is the structured flowchart of the quantity acquisition module 1 in the embodiment of the present invention;
Fig. 7 is the structured flowchart of the quantity acquisition module 1 in another embodiment of the present invention;
Fig. 8 is the schematic diagram of the wireless mesh network system that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 2, be the schematic flow sheet of the transmit power controlling method that the embodiment of the present invention provides, the method comprises the following steps:
S1, Mesh node obtains the actual quantity of neighbor node around;
S2, described Mesh node calculates the new transmitting power of described Mesh node according to described actual quantity;
S3, described Mesh node is according to described new transmitting power wireless signal emission.
See Fig. 3, it is the schematic flow sheet of step S1 in the embodiment of the present invention.In the present embodiment, step S1 comprises the steps:
S101, Mesh node is with the first transmitting power peripherad neighbor node broadcast detect-message;
S102, described Mesh node receives the feedback message corresponding to described detect-message that neighbor node around returns;
S103, the quantity of the feedback message received by described Mesh node statistics, using the actual quantity as described neighbor node.
In step s 2, the described new transmitting power calculating described Mesh node according to described actual quantity, specifically according to following formulae discovery:
W
2＝W
1*{1+[(N
1-N
2)*10]％}
Wherein, W
2for the new transmitting power of described Mesh node, W
1for described first transmitting power, N
1for the desired amt of pre-configured neighbor node, N
2for the actual quantity of neighbor node.N
1-N
2represent the error (error amount=desired value-actual value) between the quantity desired value of neighbor node and the actual quantity of neighbor node, using the adjustment amount of this this error amount of the first transmitting power * * 10*% as power, then this first transmitting power is added that this adjustment amount is as the new transmitting power of this equipment.
The embodiment of the present invention proposes a kind of transmit power controlling method in actual applications, be periodic cycle perform step S1 to S3, so described first transmitting power is actually the transmitting power in a cycle, namely adjustment before transmitting power.In a work period, described Mesh node obtains the actual quantity of neighbor node around, and went out the transmitting power (new transmitting power) in this cycle according to described actual quantity and the transmitting power in a upper cycle (the first transmitting power) according to the formulae discovery in step S2, and according to the transmitting power wireless signal emission in this cycle; The transmitting power in this cycle is also using the first transmitting power as next cycle, for calculating the new transmitting power in next cycle, so circulate execution, can science, adjust the power of Mesh node flexibly, improve the efficiency of whole Mesh network, ensure the stability of network.
As preferred embodiment, in an alternative embodiment of the invention, following restriction has been done to step S1.
See Fig. 4, it is the schematic flow sheet of step S1 in another embodiment of the present invention.In the present embodiment, step S1 comprises the steps:
S111, Mesh node is with the first transmitting power peripherad neighbor node broadcast detect-message; Wherein, described detect-message comprises the I D of message SN and described Mesh node;
S112, described Mesh node receives the feedback message that neighbor node around returns; Wherein, described feedback message comprises the I D of the neighbor node of message SN and this feedback message of transmission;
S113, described Mesh node, from received feedback message, selects the feedback message with described detect-message with identical message sequence number;
S114, according to the I D of the neighbor node in selected feedback message, counts the actual quantity of neighbor node.
Wherein, described message SN for periodicity or can comprise periodicity.
The difference of the present embodiment and the above embodiments is, in the process of actual quantity obtaining neighbor node, further comprises the verification step to feedback message.Particularly, first select the feedback message with described detect-message with identical message sequence number, with the neighbor node prevented because the reason of network delay returns many feedback messages, thus only statistics has the feedback message of identical message sequence number; And then according to the I D of the neighbor node in selected feedback message, count the actual quantity of neighbor node.Due to the difference of the I D of different neighbor node, the actual quantity of neighbor node thus just can be determined by the quantity of the I D of the different neighbor node of statistics.The present embodiment can improve the accuracy of the actual quantity of the neighbor node of acquisition further, thus can improve the accuracy controlling transmitting power.
Correspondingly, the embodiment of the present invention additionally provides a kind of Mesh node.As shown in Figure 5, it is the structured flowchart of a kind of Mesh node that the embodiment of the present invention provides, and comprising:
Quantity acquisition module 1, for obtaining the actual quantity of the neighbor node of surrounding;
Transmitting power computing module 2, for calculating the new transmitting power of described Mesh node according to described actual quantity;
Wireless signal transmitting module 3, for according to described new transmitting power wireless signal emission.
As shown in Figure 6, it is the structured flowchart of the quantity acquisition module 1 in the embodiment of the present invention.In the present embodiment, described quantity acquisition module 1 comprises:
Detect-message radio unit 101, for broadcasting detect-message with the peripherad neighbor node of the first transmitting power;
Feedback message receiving element 102, the feedback message corresponding to described detect-message that the neighbor node for receiving surrounding returns;
Quantity statistics unit 103, for adding up the quantity of received feedback message, using the actual quantity as described neighbor node.
Further, the described transmitting power computing module specifically transmitting power of Mesh node according to following formulae discovery:
W
2＝W
1*{1+[(N
1-N
2)*10]％}
Wherein, W
2for the new transmitting power of described Mesh node, W
1for described first transmitting power, N
1for the desired amt of pre-configured neighbor node, N
2for the actual quantity of neighbor node.
As shown in Figure 7, it is the structured flowchart of the quantity acquisition module 1 in another embodiment of the present invention.In the present embodiment, described quantity acquisition module 1 comprises:
Detect-message radio unit 111, for broadcasting detect-message with the peripherad neighbor node of the first transmitting power; Wherein, described detect-message comprises the ID of message SN and described Mesh node;
Feedback message receiving element 112, the feedback message that the neighbor node for receiving surrounding returns; Wherein, described feedback message comprises the ID of the neighbor node of message SN and this feedback message of transmission;
Feedback message selected cell 113, for from received feedback message, selects the feedback message with described detect-message with identical message sequence number;
Quantity statistics unit 114, for the ID according to the neighbor node in selected feedback message, counts the actual quantity of neighbor node.
In addition, the embodiment of the present invention also provides a kind of wireless mesh network system, comprises multiple above-mentioned Mesh node.All Mesh nodes arrange the desired value of equal Initial Trans and a neighbor node quantity when starting, this performance number and desired value by engineer according to network environment and experience initial setting.All Mesh nodes all regulate self transmitting power with above-mentioned transmit power controlling method, until all Mesh nodes all complete adjustment in network.
Below provide a specific embodiment so that principle of the present invention to be described.As shown in Figure 8, it is the schematic diagram of the wireless mesh network system that the embodiment of the present invention provides.For equipment MP1, after startup, equipment MP1 issues a detect-message with Initial Trans, and this detect-message contains unique ID of MP1.
Equipment MPP, MP3, MP4, MP5 around MP1 have received the detect-message that MP1 sends.
MPP, MP3, MP4 have sent feedback message subsequently, and MP5 may successfully not produce feedback message due to internal cause, and the feedback message that MP4 sends could not may make MP1 receive due to signal strength signal intensity not.
The I D comprising MPP, MP3 and MP1 in the feedback message of MP1 is sent at MPP and MP3, and the periodicity in the detect-message of MP1 issue.
Now, MP1 receives two feedback messages, and can determine it is two different neighbor devices by the I D that they comprise, and so the actual quantity of the neighbor node of MP1 is just 2.If the desired amt of setting neighbor node is 5, the actual quantity of the neighbor node of MP1 does not just reach requirement so now.Error amount is that desired value deducts actual value and 5-2=3, using this equipment current power value of number of devices error amount * 10*%* (i.e. current power value * 30%) as power adjustment.
The power of equipment MP1 is added power adjustment (i.e. current power+current power * 30%) is as the new performance number of this equipment, enter the continuation of next cycle after regulating transmitting power and issue next detect-message.
Once the actual quantity of the neighbor node of MP1 reaches requirement, do not need with regard to allowing MP1 be in listening state or resting state to continue to issue detect-message to carry out transmission power adjustment.
Miscellaneous equipment in whole network is also all the same with MP1 carries out transmission power adjustment, until all devices all completes adjustment in network.
Implement the embodiment of the present invention, there is following beneficial effect: compared to prior art, a kind of transmit power controlling method that the embodiment of the present invention proposes, based on the transmitting power of the self-adaptative adjustment Mesh node of neighbor node quantity, specifically according to described actual quantity calculate described Mesh node new transmitting power and according to described new transmitting power wireless signal emission, can make to be in the adaptive adjustment transmitting power of Mesh under varying environment, science, adjust the power of Mesh node flexibly, improve the efficiency of whole Mesh network, ensure the stability of network.Simultaneously, the embodiment of the present invention also proposes a kind of Mesh node and comprises the wireless mesh network system of multiple described Mesh node, can make neighbours' quantity that the equipment in network all reaches desirable, thus effectively complete network connection, Logistics networks all has higher stability under different scales.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a transmit power controlling method, is characterized in that, comprising:
Mesh node obtains the actual quantity of neighbor node around;
Described Mesh node calculates the new transmitting power of described Mesh node according to described actual quantity;
Described Mesh node is according to described new transmitting power wireless signal emission.
2. transmit power controlling method as claimed in claim 1, is characterized in that, described Mesh node obtains the actual quantity of neighbor node around, specifically comprises:
Mesh node is with the first transmitting power peripherad neighbor node broadcast detect-message;
Described Mesh node receives the feedback message corresponding to described detect-message that neighbor node around returns;
The quantity of the feedback message received by described Mesh node statistics, using the actual quantity as described neighbor node.
3. transmit power controlling method as claimed in claim 1, is characterized in that, described Mesh node obtains the actual quantity of neighbor node around, specifically comprises:
Mesh node is with the first transmitting power peripherad neighbor node broadcast detect-message; Wherein, described detect-message comprises the ID of message SN and described Mesh node;
Described Mesh node receives the feedback message that neighbor node around returns; Wherein, described feedback message comprises the ID of the neighbor node of message SN and this feedback message of transmission;
Described Mesh node, from received feedback message, selects the feedback message with described detect-message with identical message sequence number;
According to the ID of the neighbor node in selected feedback message, count the actual quantity of neighbor node.
4. transmit power controlling method as claimed in claim 2 or claim 3, is characterized in that, the described new transmitting power calculating described Mesh node according to described actual quantity, specifically according to following formulae discovery:
W
2＝W
1*{1+[(N
1-N
2)*10]％}
Wherein, W
2for the new transmitting power of described Mesh node, W
1for described first transmitting power, N
1for the desired amt of pre-configured neighbor node, N
2for the actual quantity of neighbor node.
5. a Mesh node, is characterized in that, comprising:
Quantity acquisition module, for obtaining the actual quantity of the neighbor node of surrounding;
Transmitting power computing module, for calculating the new transmitting power of described Mesh node according to described actual quantity;
Wireless signal transmitting module, for according to described new transmitting power wireless signal emission.
6. Mesh node as claimed in claim 5, it is characterized in that, described quantity acquisition module comprises:
Detect-message radio unit, for broadcasting detect-message with the peripherad neighbor node of the first transmitting power;
Feedback message receiving element, the feedback message corresponding to described detect-message that the neighbor node for receiving surrounding returns;
Quantity statistics unit, for adding up the quantity of received feedback message, using the actual quantity as described neighbor node.
7. Mesh node as claimed in claim 5, it is characterized in that, described quantity acquisition module comprises:
Detect-message radio unit, for broadcasting detect-message with the peripherad neighbor node of the first transmitting power; Wherein, described detect-message comprises the ID of message SN and described Mesh node;
Feedback message receiving element, the feedback message that the neighbor node for receiving surrounding returns; Wherein, described feedback message comprises the ID of the neighbor node of message SN and this feedback message of transmission;
Feedback message selected cell, for from received feedback message, selects the feedback message with described detect-message with identical message sequence number;
Quantity statistics unit, for the ID according to the neighbor node in selected feedback message, counts the actual quantity of neighbor node.
8. Mesh node as claimed in claims 6 or 7, is characterized in that, described transmitting power computing module is the transmitting power of Mesh node according to following formulae discovery specifically:
W
2＝W
1*{1+[(N
1-N
2)*10]％}
Wherein, W
2for the new transmitting power of described Mesh node, W
1for described first transmitting power, N
1for the desired amt of pre-configured neighbor node, N
2for the actual quantity of neighbor node.
9. a wireless mesh network system, is characterized in that, comprises multiple Mesh node as described in claim arbitrary in claim 5 to 8.
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| CN104640192B (en) | 2018-01-19 |
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